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* Add analyzers to MediaBrowser.XbmcMetadata * Enable TreatWarningsAsErrors for MediaBrowser.XbmcMetadata * Add analyzers to MediaBrowser.WebDashboard * Enable TreatWarningsAsErrors for MediaBrowser.WebDashboard * Disable SA1600 in favor of CS1591
155 lines
4.8 KiB
C#
155 lines
4.8 KiB
C#
#pragma warning disable CS1591
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Text;
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namespace MediaBrowser.Common.Cryptography
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{
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// Defined from this hash storage spec
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// https://github.com/P-H-C/phc-string-format/blob/master/phc-sf-spec.md
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// $<id>[$<param>=<value>(,<param>=<value>)*][$<salt>[$<hash>]]
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// with one slight amendment to ease the transition, we're writing out the bytes in hex
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// rather than making them a BASE64 string with stripped padding
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public class PasswordHash
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{
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private readonly Dictionary<string, string> _parameters;
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private readonly byte[] _salt;
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private readonly byte[] _hash;
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public PasswordHash(string id, byte[] hash)
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: this(id, hash, Array.Empty<byte>())
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{
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}
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public PasswordHash(string id, byte[] hash, byte[] salt)
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: this(id, hash, salt, new Dictionary<string, string>())
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{
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}
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public PasswordHash(string id, byte[] hash, byte[] salt, Dictionary<string, string> parameters)
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{
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Id = id;
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_hash = hash;
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_salt = salt;
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_parameters = parameters;
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}
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/// <summary>
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/// Gets the symbolic name for the function used.
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/// </summary>
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/// <value>Returns the symbolic name for the function used.</value>
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public string Id { get; }
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/// <summary>
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/// Gets the additional parameters used by the hash function.
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/// </summary>
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public IReadOnlyDictionary<string, string> Parameters => _parameters;
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/// <summary>
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/// Gets the salt used for hashing the password.
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/// </summary>
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/// <value>Returns the salt used for hashing the password.</value>
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public ReadOnlySpan<byte> Salt => _salt;
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/// <summary>
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/// Gets the hashed password.
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/// </summary>
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/// <value>Return the hashed password.</value>
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public ReadOnlySpan<byte> Hash => _hash;
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public static PasswordHash Parse(string hashString)
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{
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// The string should at least contain the hash function and the hash itself
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string[] splitted = hashString.Split('$');
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if (splitted.Length < 3)
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{
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throw new ArgumentException("String doesn't contain enough segments", nameof(hashString));
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}
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// Start at 1, the first index shouldn't contain any data
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int index = 1;
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// Name of the hash function
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string id = splitted[index++];
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// Optional parameters
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Dictionary<string, string> parameters = new Dictionary<string, string>();
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if (splitted[index].IndexOf('=', StringComparison.Ordinal) != -1)
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{
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foreach (string paramset in splitted[index++].Split(','))
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{
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if (string.IsNullOrEmpty(paramset))
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{
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continue;
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}
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string[] fields = paramset.Split('=');
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if (fields.Length != 2)
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{
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throw new InvalidDataException($"Malformed parameter in password hash string {paramset}");
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}
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parameters.Add(fields[0], fields[1]);
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}
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}
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byte[] hash;
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byte[] salt;
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// Check if the string also contains a salt
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if (splitted.Length - index == 2)
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{
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salt = Hex.Decode(splitted[index++]);
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hash = Hex.Decode(splitted[index++]);
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}
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else
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{
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salt = Array.Empty<byte>();
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hash = Hex.Decode(splitted[index++]);
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}
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return new PasswordHash(id, hash, salt, parameters);
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}
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private void SerializeParameters(StringBuilder stringBuilder)
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{
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if (_parameters.Count == 0)
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{
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return;
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}
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stringBuilder.Append('$');
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foreach (var pair in _parameters)
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{
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stringBuilder.Append(pair.Key)
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.Append('=')
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.Append(pair.Value)
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.Append(',');
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}
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// Remove last ','
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stringBuilder.Length -= 1;
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}
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/// <inheritdoc />
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public override string ToString()
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{
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var str = new StringBuilder()
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.Append('$')
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.Append(Id);
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SerializeParameters(str);
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if (_salt.Length != 0)
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{
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str.Append('$')
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.Append(Hex.Encode(_salt, false));
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}
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return str.Append('$')
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.Append(Hex.Encode(_hash, false)).ToString();
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}
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}
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}
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